Synonyms of the word

would-be

• adj. attempting or desiring something.
• adj. unfulfilled or frustrated in realizing an ambition.
• n. One who aspires to something; a wannabe.

ambitious

• adj. Possessing, or controlled by ambition; greatly or inordinately desirous of power, honor, office, superiority,…
• adj. Strongly desirous—followed by "of" or the infinitive; as, ambitious to be or to do something.
• adj. Resulting from, characterized by, or indicating, ambition; showy; aspiring.
• adj. Hard to achieve.

manque

• adj. (postpositive) unable to fully realise one's ambitions; would-be.